82489220 has 48 divisors (see below), whose sum is σ = 191673216. Its totient is φ = 29568000.

The previous prime is 82489217. The next prime is 82489229. The reversal of 82489220 is 2298428.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (82489229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12980 + ... + 18260.

It is an arithmetic number, because the mean of its divisors is an integer number (3993192).

Almost surely, 2^82489220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82489220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95836608).

82489220 is an abundant number, since it is smaller than the sum of its proper divisors (109183996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82489220 is a wasteful number, since it uses less digits than its factorization.

82489220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372 (or 5370 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 82489220 is about 9082.3576234368. The cubic root of 82489220 is about 435.3104227196.

The spelling of 82489220 in words is "eighty-two million, four hundred eighty-nine thousand, two hundred twenty".